火狐浏览器导出表格名字乱码

var Agent = m_page.Request.Browser.Browser;
if (Agent != "Firefox")//火狐无需编码
{
FileName = HttpUtility.UrlEncode(Encoding.UTF8.GetBytes(FileName));
}
m_page.Response.AppendHeader("content-disposition", "attachment;filename=\"" + FileName + ".xls\"");